Published November 18, 2021 © MIT

Arduino Basic Project-#4

This project will discuss about the RGB LED.

BeginnerFull instructions provided30 minutes548

Things used in this project

Hardware components

Arduino UNO

Breadboard (generic)

Resistor 220 ohm

Jumper wires (generic)

RGB Diffused Common Anode

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Fritzing

Story

Introduction

In this project I am going to discuss about the basics of RGB LED light.

RGB LED

RGB LED is a combination of 3 different LEDs and they are Red, Green and Blue. We can use it in different purposes. Some common usages are designing our home, event stage design, LED matrix display etc. An image of RGB led has shown below:

https://cdn.sparkfun.com//assets/parts/6/5/5/7/11120-Diffused_LED_-_RGB_10mm-01.jpg

As we mentioned above that the RGB led has three types of led in itself. These LEDs are sharing common anode or common cathode. On this basis we can divide RGB LED into two types, one is Common Anode RGB LED and another one is Common Cathode RGB LED.

Common Anode RGB

All three led's anode will be short with each other internally. Then this common point will be attached with the RGB anode. We just need to add this common point to the positive terminal of the power source. On the other hand other three terminal will need to attach to the digital pin of the Arduino.

Common Cathode RGB

In this type of RGB all three internal led's cathode will be short with each other. Then the RGB LED's cathode will be attached to the common cathode point of the LED. Here, we just need to add the GND terminal of Arduino to the common point that is basically the cathode point of the RGB. Remaining three pins will be connected with the digital pins of the Arduino.

Two types of RGB LED image has shown below:

https://www.circuitstoday.com/wp-content/uploads/2021/02/types-of-rgb-min.jpg

Circuit Analysis

Arduino ------------------------ RGB LED

Digital Pin - 8 ----------------- GREEN LED

Digital Pin - 9 ----------------- BLUE LED

Digital Pin - 11 ----------------- RED LED

+5V ------------ Common point (Anode Pin)

Demonstration Video

Note

In demonstration video we have used Common Anode RGB LED and in Tinkercad project we have used Common Cathode RGB LED.

Links

Github Repository Link: https://github.com/KAST-Tech/arduino-basics-projects/tree/main/Project-%234

Tinkercad Project Link: https://www.tinkercad.com/things/abAcGTAehVM

Schematics

Code

//Date: 16/11/21
//Name: Khaled Md. Saifullah
//KastTech
//Dhaka,Bangladesh

int green = 8;
int blue = 9;
int red = 11;

void setup() {
  pinMode(red,OUTPUT);
  pinMode(green,OUTPUT);
  pinMode(blue,OUTPUT);

}

void loop() {
  //Red color light up
  digitalWrite(red,HIGH);
  digitalWrite(green,LOW);
  digitalWrite(blue,LOW);
  delay(1000);

  //Green color light up
  digitalWrite(red,LOW);
  digitalWrite(green,HIGH);
  digitalWrite(blue,LOW);
  delay(1000);

  //Blue color light up
  digitalWrite(red,LOW);
  digitalWrite(green,LOW);
  digitalWrite(blue,HIGH);
  delay(1000);
}

//Date: 18/11/21
//Name: Khaled Md. Saifullah
//KastTech
//Dhaka,Bangladesh

// RGB light using anolog value
int red= 11;
int blue = 9;
int green = 8;

void setup() {
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
}
void loop() {
  rgbColor(255, 0, 0); // Red
  delay(1000);
  rgbColor(0, 255, 0); // Green
  delay(1000);
  rgbColor(0, 0, 255); // Blue
  delay(1000);
  rgbColor(255, 255, 125); // Raspberry
  delay(1000);
  rgbColor(255,105,180); // Pink
  delay(1000);
  rgbColor(0, 255, 255); // Cyan
  delay(1000);
  rgbColor(255, 0, 255); // Magenta
  delay(1000);
  rgbColor(255, 255, 0); // Yellow
  delay(1000);
  rgbColor(255, 255, 255); // White
  delay(1000);
}
void rgbColor(int redValue, int greenValue, int blueValue)
 {
  analogWrite(red, redValue);
  analogWrite(green, greenValue);
  analogWrite(blue, blueValue);
}

Credits

Khaled Md Saifullah

18 projects • 44 followers

🦸Tech Enthusiast 👨🏾‍💻Programmer 📳IoT Specialist

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